php实现可以设置中奖概率的抽奖程序代码分享

<div class="jb51code">
<pre class="brush:PHP;">
<?PHP
/**

• 抽奖
• @param int $total
  /
  function getReward($total=1000)
  {
  $win1 = floor((0.12$total)/100);
  $win2 = floor((3$total)/100);
  $win3 = floor((12$total)/100);
  $other = $total-$win1-$win2-$win3;
  $return = array();
  for ($i=0;$i<$win1;$i++)
  {
  $return[] = 1;
  }
  for ($j=0;$j<$win2;$j++)
  {
  $return[] = 2;
  }
  for ($m=0;$m<$win3;$m++)
  {
  $return[] = 3;
  }
  for ($n=0;$n<$other;$n++)
  {
  $return[] = '谢谢惠顾';
  }
  shuffle($return);
  return $return[array_rand($return)];
  }

$data = getReward();
echo $data;
?>